– Lat/Long: 48.71° N 121.99° W
South Twin Sister
Weather Forecast, United StatesIssued: 9 am Sun 04 Jan Local TimeUpdates in: hr min sUpdate imminent
Issued: 9 am Sun 04 Jan Local Time
Updates in:
Update imminent hr min s
Issued: 9 am Sun 04 Jan Local Time
Updates in:
Update imminent hr min s
3 South Twin Sister Elevations: 3 Forecast Elevations: Days 1–3 Weather SummaryHeavy rain (total 44mm) on Sun morning. Becoming colder with heavy fall of snow, heaviest during Tue morning. Freeze-thaw conditions (max 4°C on Sun morning, min 0°C on Tue night). Wind will be generally light. | Days 4–6 Weather SummaryA heavy fall of snow, heaviest during Wed afternoon. Becoming milder with light rain (total 5mm) on Fri morning. Freeze-thaw conditions (max 3°C on Fri morning, min -2°C on Wed night). Wind will be generally light. | |||||||||||||||||
Sunday 4 | Monday 5 | Tuesday 6 | Wednesday 7 | Thursday 8 | Friday 9 | |||||||||||||
AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | |
 |  |  |  |  |  |  | |  |  | | | | | | | |  | |
heavy rain | mod. rain | heavy rain | light rain | some clouds | light snow | mod. snow | mod. snow | mod. snow | light snow | light snow | light snow | light snow | light snow | light snow | light rain | some clouds | some clouds | |
km/h | ||||||||||||||||||
 |  |  |  |  |  | |||||||||||||
— | — | — | — | — | 2 | 8 | 8 | 8 | 4 | 4 | 5 | 3 | 2 | 3 | — | — | — | |
19 | 6 | 16 | 3 | — | — | — | — | — | — | — | — | — | — | 1.9 | 3 | — | — | |
max °C | 4 | 4 | 3 | 2 | 2 | 2 | 2 | 2 | 1 | 1 | 0 | 0 | 0 | 0 | 2 | 3 | 3 | 3 |
min °C | 4 | 3 | 2 | 2 | 1 | 1 | 2 | 2 | 0 | 1 | 0 | -2 | -1 | 0 | 1 | 3 | 3 | 2 |
0 | -1 | 0 | 0 | 1 | -3 | -3 | -2 | -4 | -3 | -4 | -2 | -4 | -2 | -1 | 0 | 0 | 0 | |
1250 | 1100 | 950 | 850 | 750 | 750 | 800 | 850 | 600 | 600 | 550 | 400 | 350 | 550 | 750 | 1000 | 1300 | 1850 | |
Cloud base (m) | 550 | 550 | 550 | 550 | 600 | 550 | 550 | 550 | 550 | 550 | 550 | 600 | 600 | 750 | 600 | 600 | 750 | 700 |
 | 8:00 | — | — | 8:00 | — | — | 7:58 | — | — | 7:58 | — | — | 7:58 | — | — | 7:58 | — | — |
 | — | 4:24 | — | — | 4:27 | — | — | 4:28 | — | — | 4:29 | — | — | 4:30 | — | — | 4:30 | — |
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South Twin Sister Weather (Days 0-3):
The weather forecast for South Twin Sister is: Heavy rain (total 44mm) on Sun morning. Becoming colder with heavy fall of snow, heaviest during Tue morning. Freeze-thaw conditions (max 4°C on Sun morning, min 0°C on Tue night). Wind will be generally light.
South Twin Sister Weather (Days 3-6):
A heavy fall of snow, heaviest during Wed afternoon. Becoming milder with light rain (total 5mm) on Fri morning. Freeze-thaw conditions (max 3°C on Fri morning, min -2°C on Wed night). Wind will be generally light.
This table gives the weather forecast for South Twin Sister at the specific elevation of 500 m. Our advanced weather models allow us to provide distinct weather forecasts for several elevations of South Twin Sister. To see the weather forecasts for the other elevations, use the tab navigation above the table. For a wider overview of the weather, consult the Weather Map of Washington.